A heptazine-based polymer photocatalyst with donor-acceptor configuration to promote exciton dissociation and charge separation

Xie, Zhipeng, Wang, Wenbin, Ke, Xiating, Cai, Xu ORCID: 0000-0002-1790-7915, Chen, Xiong ORCID: 0000-0003-2878-7522, Wang, Sibo ORCID: 0000-0003-2656-9169, Lin, Wei ORCID: 0000-0002-5046-4765 and Wang, Xinchen ORCID: 0000-0002-2490-3568 (2023) A heptazine-based polymer photocatalyst with donor-acceptor configuration to promote exciton dissociation and charge separation. Applied Catalysis B: Environmental, 325. p. 122312.

	Text 1-s2.0-S092633732201253X-mmc1.docx - Supporting information Download (12MB)
	Text manuscript.pdf - Submitted version Download (1MB) \| Preview

Official URL: http://dx.doi.org/10.1016/j.apcatb.2022.122312

Abstract

Polymeric carbon nitride (PCN) is an emerging class of polymer semiconductor photocatalysts, but bulk PCN typically suffers from low visible-light-harvesting ability, high activation energy, and rapid charge recombination. In this context, using the same core building block, a donor-acceptor (D-A) type heptazine-based polymer, namely BPCN, was proposed via Friedel-Crafts arylation reaction to tackle these issues. Comparatively, the affording BPCN features extended light absorption, reduced activation energy, and suppressed charge recombination, triggered by the electron push-pull interactions as a consequence of the D-A configuration. BPCN is elucidated to be an effective heterogeneous photocatalyst for aerobic organic transformations and a wide range of substrate scopes and reactions were realized. Besides, BPCN also showed an advantage in mediating the photocatalytic water oxidation reaction, achieving a nearly 10-fold oxygen evolution reaction (OER) rate over PCN. These findings demonstrate the great potential of the rational design of heptazine-based polymers with D-A configurations for artificial photosynthesis.

Item Type:	Article
Uncontrolled Keywords:	7 Affordable and Clean Energy
Divisions:	Faculty of Science and Engineering > School of Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	24 Feb 2023 11:43
Last Modified:	17 Mar 2024 16:05
DOI:	10.1016/j.apcatb.2022.122312
Related URLs:	Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3168493